Puller-clamp



i. A. WEAVER.

FULLER CLAMP.

APPLICATION FILED APR. 28, 1919.

1,332,277. Patented Mar. 2,1920.

IRA A. WEAVER, OF SPRINGFIELD, ILLINOIS, ASSIGNOR T0 WEAVER MAN UFAO'IURIN G COMPANY, OF SPRINGFIELD, ILLINOIS, A CORPORATION OF ILLINOIS.

FULLER-CLAMP.

Specification of Letters Patent.

Patented Mar. 2, 1920.

Application filed April 28, 1919. Serial No. 293,276.

To all whom it may concern:

Be it known that I, IRA A. WEAVER, a citizen of the United States, residing at S pringfield, in the county of Sangamon and State of Illinois, have invented certain new and useful Improvements in Puller-Clamps, of"

which the following is a specification.

The present invention is designed to provide a clamp or holding device adapted to securely grasp and hold an article to facilitate its separation or removal from or application to some other part or element and is intended particularly to be used on such articles as are too small to be held otherwise and are of such shape and conformation as to render effective hold on them difficult or impossible without some auxiliary device of this general kind. For example, under ordinary circumstances it is difficult to remove a ball-bearing raceway from the armature shaft of a small electric generator or motor particularly when such part is close to the commutator or body of the armature. It requires some appliance that can grasp it securely and hold it firmly without injury while the shaft and raceway are being sep arated or assembled. This improved clamp provides such a desirable and convenient means, but of course, its uses are manifold.

In its preferred embodiment, although it is capable of incorporation in a variety of physical. forms, the invention comprises a pair of grooved or slotted yokes receiving the end portions of a pair of parallel clamp-bars provided along their proximate edges with registering recesses of graduated sizes to 0perate on elements of different diameters, the yokes having screws by which these bars may be pressed or forced toward one another to clamp the article between them in the mating recesses of corresponding size or dimension. Preferably these clamp-bars are reversible and recessed on their opposite edges thus increasing the range of capacity of the device. Having thus clamped the part to be removed, thereby affording means for application of power thereto, the elements, ball-race and shaft, for instance, are

forcibly separated by means of a suitable press or other device.

In order that those skilled in this art may understand the advantages of this invention I have illustrated in the accompany ing drawing forming a part of this specification a desirable and convenient embodiment of the device and throughout the views of this drawing like reference characters refer to the same parts.

In this drawing:

Figure l is a face view and Fig. 2 is a section through the same on line 2-2 of Fig. 1 showing its application to the ball-bearing race-way of an electric motor or generator.

By referring to these views of the drawing it will be observed that the device includes a pair of slotted yokes or holders 10, 1.0, each having through a side-wall thereof near one end a threaded aperture 11 accommodating a thumb-screw 12. At its opposite end each of such yokes or holders has a threaded hole 13 through its end wall receiving a pressure-screw 14-.

The appliance includes also a pair of flat bars or blades 15, 15 of equal length and of thickness practically equaling the width of the slots in the yokes. The end portions or sections of such blades or bars are received in the slots of the yoke-s as shown, and one of such bars held fixedly in position therein by tightening or turning down the screws 12, 12 which bear against its fiat face, one longitudinal. edge of such bar lying against the end-walls of the yokes. The companion blade or bar 15 is received in the yokes and is adapted to be forced toward the bar 16 by the turning of screws 14, 14.. This bar 15 is somewhat free to shift lengthwise slightly in the yokes whereby it may automatically center itself with respect to the companion bar and to the element to be clamped as it engages the latter.

The two bars or blades on their adjacent edges have mating or registering substantially semicircular cavities or recesses unitedly forming almost complete circles of different sizes to clamp bodies of various cali-' hers, thus the proximate edges of the two bars are provided with three recesses 17, 18 and 19 of different sizes. The edges of such recesses are beveled at 20 whereby the margins of the cavities are at one side of the median line of the bar thus permitting the blades or bars to engage a ball-race or similar device when the latter is close to some other element. For example, as shown in Fig. 2 the blades are shown clamping a ball-race member 21 mounted on the sh aft of a generator armature.

of the appliance;

In the same manner the opposite edges of the bars or blades are provided with simi lar cavities or recesses 22-, 23 of differing sizes having their margins beveled as in the other instance. Obviously, by reversing these bars or blades the pairs of cavities 2:2, 23, 23, may be brought into cooperative or mating relation.

After the member to be clamped is lirnily secured between the blades or bars 15, 16, in the manner indicated, and held in such clamping position by the screws 14, 14- the body 21 may be readily removed from its shaft because the clamping device aifords means of substantial size against which the pressing or forcing device to be employed may act. In somewhat similar manner ele ments or members of various kinds may be assembled instead of disassociated.

While I have herein depicted and described one particular embodiment of the invention it is to be understood that the in vention is not limited and restricted to tl e precise and exact structural details presented because these may comparatively wide limits without departure from the substanceand essence of the invention. In other words, the invention is capable of a variety of embodiments and the one presented is merely by way of illustration or example only.

I claim:

1.1n a clamping appliance of the charbe varied within acter described, the combination of a Jair of separate independent slotted end yo (es, a pair of reversible clainpbars having end portions received in the slots of said yokes, each of said bars having in its opposite edges recesses 01 graduated sizes, the corresponding recesses of the two bars occupying a corresponding positions in said bars, means to prevent longitudinal shifting of one OTl' said bars relatively to said yokes, and hide pendently-operable. screws inv said yolres adaptedto press one of sa'idbars toward the other to clamp an object between them in the mating recesses,"substantially as described.

2. 1n a'clamping appliance of the character described, the combination of a pair of separate independent slotted end yokes, a pair of reversible clamp-bars having end portions received in the slots of said yolzes, each of said bars having in its opposite edges recesses of graduated sizes, the margins of said recesses beingbeveled more on one side than. on the other, the corresponding recesses of the two bars occupying corresponding positions in said bars, means to prevent longitudinal shifting of one of said bars relatively to said yokes, and independ ently-operable screws in said yokes adapted to press one of said bars toward the other to clamp an object between them in their mating recesses, substantially as described.

IRA A. WEAVER.

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